I would think that one would polyjuice into what the hair was at the time it was harvested. If it were specifically designed to only mimic genetic coding, it would be a replica of the person, like a clone, but I have no idea how that would be reflected in age. I suppose chronological age is somehow keyed into genetics, but I know nothing of gene-mapping, so I don't really know. Since polyjuice is magic, I would guess it would simply reflect the age of the subject at the time of harvest. A hair from one's babyhood might produce a baby. It would be funny to have some sort of accident and have an age alteration of some sort. I did read a fic once where Harry found a dark artifact that could change a person back to half their age, but only for an hour or so. Of course he tried it.
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Date: 2013-01-10 06:13 am (UTC)